Flood hazard assessment in large plain basins with a scarce slope in the Pampean Plain, Argentina

Floods are one of the most common natural phenomena and represent a serious hazard when they affect human activities. Structural measures commonly used to mitigate them; however, these do not always give good results, mainly in plain areas with scarce slope. In this sense, generation flood map contributes adequate management disaster prevention. The aim work is evaluate hydrological basins slope, taking as case study Samborombón river basin located Pampean Plain, Argentina. For this, was made based on analytical hierarchy process using GIS, into account physical aspects terrain, observations, field measurements. Likewise, validated satellite images inhabitants danger were quantified. results show that correspond floodplain rivers tributaries, while main secondary divide zones have low sectors. On other hand, numerous urban settlements identified within areas, being vicinity old centers new gated communities high value homes, quantifying 1961 at showing poor territorial planning. methodology proposed gives agencies possibility generating land use maps, well designing mitigation contingency plans after large rainfall event.